A mass m = 50 kg is attached to a light string which is wrapped around a cylindrical spool of radius R = 0.1 m and moment of inertia I = 4.0 kgᐧm2. The spool is suspended from the ceiling and the mass is released from rest a distance h = 5 m above the floor. How long does it take for the mass to hit the floor?

iron would move it is magnetic there is a mag field around the current in the wire

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.